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o3-mini vs Kimi K3

At a glance

Cost-efficient reasoning model for STEM tasks.

200K ctx$1.10/$4.40 per M

MoonshotAI's 2.8T-parameter flagship for complex coding, knowledge work, and long-horizon agent runs.

1.0M ctx$0.30/$11.94 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper40%
Reasoning & Knowledge
Graduate Science—Expert-Level—Factual Recall—
Math
Competition Math—
Agentic
Terminal Tasks—Novel Reasoning—
Reasoning
CodingInsufficient data
Sources:Epoch AI·Provider·OpenRouter· as of 2026-10-02
Reasoning & Knowledge
Graduate Science93.5%Expert-Level43.5%Factual Recall50.6%
Math
Competition Math97.2%
Agentic
Terminal Tasks88.3%Novel Reasoning60.4%
Specs
200K
Context
100K
Max output
Jan 2025
Released
1.0M
Context
256K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$1.10/M tokens
Output63%$4.40/M tokens
Cache read$0.55/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input72%$0.30/M tokens
Output$11.94/M tokens
Cache read62%$0.21/M tokens
Chat with o3-miniGo to model
Chat with Kimi K3Go to model
Frequently Asked Questions: o3-mini vs Kimi K3▼

Which is better, o3-mini or Kimi K3?

▼

Both o3-mini and Kimi K3 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, o3-mini or Kimi K3?

▼

o3-mini has a lower blended cost. o3-mini: $1.10 input / $4.40 output. Kimi K3: $0.30 input / $11.94 output.

Which has a larger context window, o3-mini or Kimi K3?

▼

Kimi K3 has a larger context window: o3-mini supports 200K tokens vs Kimi K3 at 1M tokens.

Do both o3-mini and Kimi K3 support vision?

▼

Kimi K3 supports vision/image input, but o3-mini does not.

What are the key differences between o3-mini and Kimi K3?

▼

Key differences: Kimi K3 is significantly cheaper; only Kimi K3 supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both o3-mini and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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